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PHP error handling function trigger_error()

Description 

PHP function trigger_error() generates a user-level error or warning or notice.

The function can be used either along with the built-in error handler or with a user defined function which is set as the new error handler (set_error_handler()).

If you want to generate a specific response to an exception at runtime, using this function is useful.

Version:

PHP 4 >= 4.0.1, PHP 5.

Syntax:

trigger_error (error_msg,  error_type )

Parameter:

Parameters Description Required / Optional Type
error_msg A string which will be displayed as an error message. Required string
error_type Specifies the error type for an error message.
Values may be -
1. E_USER_ERROR.
2. E_USER_WARNING.
3. E_USER_NOTICE.
Optional integer

Return Values:

The function returns FALSE if the wrong error_type is specified. Otherwise, it returns TRUE.

Example:

 <?php
  $a = 12;
  $b = 5;
  if($a%$b == 0)
  trigger_error("This is an error",E_USER_NOTICE );
  ?>
 

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